Re: [PATCH v2 4/6] test: fix unsupported BPF instructions in elf load test

[Bruce Richardson <bruce.richardson@intel.com>]

On Mon, Jan 19, 2026 at 05:55:07PM -0800, Stephen Hemminger wrote:
> The DPDK BPF library only handles the base BPF instructions.
> It does not handle JMP32 which would cause the bpf_elf_load
> test to fail on clang 20 or later.
> 
> Bugzilla ID: 1844
> Fixes: cf1e03f881af ("test/bpf: add ELF loading")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
> Acked-by: Marat Khalili <marat.khalili@huawei.com>
> ---
>  app/test/bpf/meson.build | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/app/test/bpf/meson.build b/app/test/bpf/meson.build
> index aaecfa7018..91c1b434f8 100644
> --- a/app/test/bpf/meson.build
> +++ b/app/test/bpf/meson.build
> @@ -24,7 +24,8 @@ if not xxd.found()
>  endif
>  
>  # BPF compiler flags
> -bpf_cflags = [ '-O2', '-target', 'bpf', '-g', '-c']
> +# At present: DPDK BPF does not support v3 or later
> +bpf_cflags = [ '-O2', '-target', 'bpf', '-mcpu=v2', '-g', '-c']
>  
>  # Enable test in test_bpf.c
>  cflags += '-DTEST_BPF_ELF_LOAD'
> -- 

One small additional thing in the bpf autotest, is that the test fails if
net/null driver is disabled. It would be good if it reported skipped in
that case.

/Bruce